Fluke Fiber Viewer FT140 - Manual (Page 10)

Rotary Field Indication
The voltage testers are equipped with a double-
pole rotary field indicator.
The safety measures have to be met
The rotary phase indication is always active.
The symbols R or L are always displayed.
However, the rotary direction can only be deter-
mined within a three-phase system. Here, the
instrument indicates the voltage between two
external conductors.
• Connect the instrument test probe with the
supposed phase L2 and the handle test
probe with the supposed phase L1.
• Touch Accessible electrode (11).
The voltage and the rotary field direction are
displayed.
signifies that the supposed phase L1 is
the actual phase L1 and the supposed
phase L2 is the actual phase L2
==> right rotary field
signifies that the supposed phase L1 is
the actual phase L2 and the supposed
phase L2 is the actual phase L1
==> left rotary field.
When re-testing with exchanged test pro-
bes the opposite symbol has to be illumi-
nated.
Measurement Point Illumination
Voltage testers T100re equipped with a measu-
rement point illumination feature. Thus, working
under bad lighting conditions (e.g. division
switch cabinets) is made easier.
• Press button for measurement point illuminati-
on (10) on instrument rear.
L
R
L1
L2 L3
N
PE
L
L1
L2 L3
N
PE
R
Fluke T100/120/140
Users Manual
10